Ejemplo n.º 1
0
// NewMacVlanLink creates macvlan network link
//
// It is equivalent of running:
//		ip link add name mc${RANDOM STRING} link ${master interface} type macvlan
// NewMacVlanLink returns MacVlaner which is initialized to a pointer of type MacVlanLink if the
// macvlan link was created successfully on the Linux host. Newly created link is assigned
// a random name starting with "mc". It sets the macvlan mode to "bridge" mode which is a default.
// It returns error if the link could not be created.
func NewMacVlanLink(masterDev string) (MacVlaner, error) {
	macVlanDev := makeNetInterfaceName("mc")

	if ok, err := NetInterfaceNameValid(masterDev); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(masterDev); err != nil {
		return nil, fmt.Errorf("Master MAC VLAN device %s does not exist on the host", masterDev)
	}

	if err := netlink.NetworkLinkAddMacVlan(masterDev, macVlanDev, default_mode); err != nil {
		return nil, err
	}

	macVlanIfc, err := net.InterfaceByName(macVlanDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	masterIfc, err := net.InterfaceByName(masterDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &MacVlanLink{
		Link: Link{
			ifc: macVlanIfc,
		},
		masterIfc: masterIfc,
		mode:      default_mode,
	}, nil
}
Ejemplo n.º 2
0
// NewMacVlanLinkWithOptions creates macvlan network link and sets som of its network parameters
// passed in as MacVlanOptions.
//
// It is equivalent of running:
// 		ip link add name ${macvlan name} link ${master interface} address ${macaddress} type macvlan mode ${mode}
// NewMacVlanLinkWithOptions returns MacVlaner which is initialized to a pointer of type MacVlanLink if the
// macvlan link was created successfully on the Linux host. If particular option is empty, it sets default value if possible.
// It returns error if the macvlan link could not be created or if incorrect options have been passed.
func NewMacVlanLinkWithOptions(masterDev string, opts MacVlanOptions) (MacVlaner, error) {
	if ok, err := NetInterfaceNameValid(masterDev); !ok {
		return nil, err
	}

	if _, err := net.InterfaceByName(masterDev); err != nil {
		return nil, fmt.Errorf("Master MAC VLAN device %s does not exist on the host", masterDev)
	}

	if err := validateMacVlanOptions(&opts); err != nil {
		return nil, err
	}

	if err := netlink.NetworkLinkAddMacVlan(masterDev, opts.Dev, opts.Mode); err != nil {
		return nil, err
	}

	macVlanIfc, err := net.InterfaceByName(opts.Dev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	if opts.MacAddr != "" {
		if err := netlink.NetworkSetMacAddress(macVlanIfc, opts.MacAddr); err != nil {
			if errDel := DeleteLink(macVlanIfc.Name); errDel != nil {
				return nil, fmt.Errorf("Incorrect options specified. Attempt to delete the link failed: %s", errDel)
			}
		}
	}

	masterIfc, err := net.InterfaceByName(masterDev)
	if err != nil {
		return nil, fmt.Errorf("Could not find the new interface: %s", err)
	}

	return &MacVlanLink{
		Link: Link{
			ifc: macVlanIfc,
		},
		masterIfc: masterIfc,
		mode:      opts.Mode,
	}, nil
}